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expansion joints on wood fascia boards

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Forum topic by sam1140 posted 11-11-2011 09:49 PM 3434 views 0 times favorited 6 replies Add to Favorites Watch
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sam1140

9 posts in 1589 days


11-11-2011 09:49 PM

I am replacing the fascia board in my home with 1×8 pine wood. The south wall alone is 83’ long, I am using 16’ & 12’ boards, they will be attached to the 2×6 rafters. I am planning to use 45 cut to joint the boards. I am confused about expansion joints, if I use 45 to joint the boards how you leave a gap?

(1) Can I joint the boards tight or leave a gap? (2) Is it better to joint the boards with a straight cut and leave a gap? (3) If I have to leave a gap, do I fill the gap with putty? (4) I received conflicting advise concerning nails or screws. Since I have to do 250’, I would like to know what is best to use, screws, casing nails, or round head nails? I have a cordless paslode nailer I can use, or rent an air hammer if I have to, also what size nails or screws should I use?
I don’t mind using round head nails and pain over them. To counter sink and putty so many nails would take me forever. Any advise and help will be greatly appreciated.


6 replies so far

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Don W

15560 posts in 1318 days


#1 posted 11-11-2011 11:04 PM

I’ve dona a lot of facia boards in my life. Here is the way I did them. 45 the joint. The 45 will allow enough movement for the facia. Nail with #8 or #10 galvanized nails. I prefer #8. Don’t leave a gap. The joint should always fall on a rafter. I typically used a nail gun, but hand drives will work. If you were going to leave the wood clear or stained get siding nails, they have a smaller head.

-- Master hand plane hoarder. - http://timetestedtools.com

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sam1140

9 posts in 1589 days


#2 posted 11-12-2011 04:17 AM

Thank you for your reply. I am painting the boards. Concerning the nails, are they round head or the small casing nails? I can get galvanized nails with round head for my framing cordless paslode nail gun.

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Don W

15560 posts in 1318 days


#3 posted 11-12-2011 03:31 PM

galvanized nails with round heads for my framing cordless paslode nail gun will work just fine

-- Master hand plane hoarder. - http://timetestedtools.com

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sam1140

9 posts in 1589 days


#4 posted 11-12-2011 11:05 PM

Thanks again for your help, using the paslode, I don’t have to rent another nailer.

View WDHLT15's profile

WDHLT15

1215 posts in 1227 days


#5 posted 11-14-2011 04:54 AM

Don’t leave a gap. Bevel the joint on a 45 degree bevel. Wood does not shrink or swell longitudinally (lengthwise).

-- Danny Located in Perry, GA. Forester. Wood-Mizer LT15 Sawmill. Nyle L53 Dehumidification Kiln. hamsleyhardwood.com

View JimDaddyO's profile

JimDaddyO

288 posts in 1830 days


#6 posted 11-14-2011 02:57 PM

also: face your joints so that from the most viewed angle you look “over” the joint and not “into” the joint.

looking———->/__

where the underline is the back ( the side you do not see) of the facia, and the / represents the angle of the joint.

-- I still have all my fingers

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